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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ab24a6f378dbfdb4d300fdfea77aeaa95adef7aed3cf2c6724d04779a40166f' 
  AND token = 'fgxy1uEdOV5k6ubG8KkdqMSdqm0hbmLP1TItJBBUr9o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}